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1965aae3 PA |
1 | #ifndef _ASM_X86_PGTABLE_H |
2 | #define _ASM_X86_PGTABLE_H | |
6c386655 | 3 | |
c47c1b1f | 4 | #include <asm/page.h> |
1adcaafe | 5 | #include <asm/e820.h> |
c47c1b1f | 6 | |
8d19c99f | 7 | #include <asm/pgtable_types.h> |
b2bc2731 | 8 | |
8a7b12f7 | 9 | /* |
10 | * Macro to mark a page protection value as UC- | |
11 | */ | |
12 | #define pgprot_noncached(prot) \ | |
13 | ((boot_cpu_data.x86 > 3) \ | |
14 | ? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \ | |
15 | : (prot)) | |
16 | ||
4614139c | 17 | #ifndef __ASSEMBLY__ |
195466dc | 18 | |
55a6ca25 PA |
19 | #include <asm/x86_init.h> |
20 | ||
8405b122 JF |
21 | /* |
22 | * ZERO_PAGE is a global shared page that is always zero: used | |
23 | * for zero-mapped memory areas etc.. | |
24 | */ | |
3cbaeafe | 25 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
8405b122 JF |
26 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
27 | ||
e3ed910d JF |
28 | extern spinlock_t pgd_lock; |
29 | extern struct list_head pgd_list; | |
8405b122 | 30 | |
617d34d9 JF |
31 | extern struct mm_struct *pgd_page_get_mm(struct page *page); |
32 | ||
54321d94 JF |
33 | #ifdef CONFIG_PARAVIRT |
34 | #include <asm/paravirt.h> | |
35 | #else /* !CONFIG_PARAVIRT */ | |
36 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) | |
37 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) | |
2609ae6d | 38 | #define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd) |
54321d94 | 39 | |
54321d94 JF |
40 | #define set_pte_atomic(ptep, pte) \ |
41 | native_set_pte_atomic(ptep, pte) | |
42 | ||
43 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) | |
44 | ||
45 | #ifndef __PAGETABLE_PUD_FOLDED | |
46 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) | |
47 | #define pgd_clear(pgd) native_pgd_clear(pgd) | |
48 | #endif | |
49 | ||
50 | #ifndef set_pud | |
51 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) | |
52 | #endif | |
53 | ||
54 | #ifndef __PAGETABLE_PMD_FOLDED | |
55 | #define pud_clear(pud) native_pud_clear(pud) | |
56 | #endif | |
57 | ||
58 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) | |
59 | #define pmd_clear(pmd) native_pmd_clear(pmd) | |
60 | ||
61 | #define pte_update(mm, addr, ptep) do { } while (0) | |
62 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
2609ae6d AA |
63 | #define pmd_update(mm, addr, ptep) do { } while (0) |
64 | #define pmd_update_defer(mm, addr, ptep) do { } while (0) | |
54321d94 | 65 | |
54321d94 JF |
66 | #define pgd_val(x) native_pgd_val(x) |
67 | #define __pgd(x) native_make_pgd(x) | |
68 | ||
69 | #ifndef __PAGETABLE_PUD_FOLDED | |
70 | #define pud_val(x) native_pud_val(x) | |
71 | #define __pud(x) native_make_pud(x) | |
72 | #endif | |
73 | ||
74 | #ifndef __PAGETABLE_PMD_FOLDED | |
75 | #define pmd_val(x) native_pmd_val(x) | |
76 | #define __pmd(x) native_make_pmd(x) | |
77 | #endif | |
78 | ||
79 | #define pte_val(x) native_pte_val(x) | |
80 | #define __pte(x) native_make_pte(x) | |
81 | ||
224101ed JF |
82 | #define arch_end_context_switch(prev) do {} while(0) |
83 | ||
54321d94 JF |
84 | #endif /* CONFIG_PARAVIRT */ |
85 | ||
4614139c JF |
86 | /* |
87 | * The following only work if pte_present() is true. | |
88 | * Undefined behaviour if not.. | |
89 | */ | |
3cbaeafe JP |
90 | static inline int pte_dirty(pte_t pte) |
91 | { | |
a15af1c9 | 92 | return pte_flags(pte) & _PAGE_DIRTY; |
3cbaeafe JP |
93 | } |
94 | ||
95 | static inline int pte_young(pte_t pte) | |
96 | { | |
a15af1c9 | 97 | return pte_flags(pte) & _PAGE_ACCESSED; |
3cbaeafe JP |
98 | } |
99 | ||
100 | static inline int pte_write(pte_t pte) | |
101 | { | |
a15af1c9 | 102 | return pte_flags(pte) & _PAGE_RW; |
3cbaeafe JP |
103 | } |
104 | ||
105 | static inline int pte_file(pte_t pte) | |
106 | { | |
a15af1c9 | 107 | return pte_flags(pte) & _PAGE_FILE; |
3cbaeafe JP |
108 | } |
109 | ||
110 | static inline int pte_huge(pte_t pte) | |
111 | { | |
a15af1c9 | 112 | return pte_flags(pte) & _PAGE_PSE; |
4614139c JF |
113 | } |
114 | ||
3cbaeafe JP |
115 | static inline int pte_global(pte_t pte) |
116 | { | |
a15af1c9 | 117 | return pte_flags(pte) & _PAGE_GLOBAL; |
3cbaeafe JP |
118 | } |
119 | ||
120 | static inline int pte_exec(pte_t pte) | |
121 | { | |
a15af1c9 | 122 | return !(pte_flags(pte) & _PAGE_NX); |
3cbaeafe JP |
123 | } |
124 | ||
7e675137 NP |
125 | static inline int pte_special(pte_t pte) |
126 | { | |
606ee44d | 127 | return pte_flags(pte) & _PAGE_SPECIAL; |
7e675137 NP |
128 | } |
129 | ||
91030ca1 HD |
130 | static inline unsigned long pte_pfn(pte_t pte) |
131 | { | |
132 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
133 | } | |
134 | ||
087975b0 AM |
135 | static inline unsigned long pmd_pfn(pmd_t pmd) |
136 | { | |
137 | return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
138 | } | |
139 | ||
91030ca1 HD |
140 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
141 | ||
3cbaeafe JP |
142 | static inline int pmd_large(pmd_t pte) |
143 | { | |
18a7a199 | 144 | return (pmd_flags(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3cbaeafe JP |
145 | (_PAGE_PSE | _PAGE_PRESENT); |
146 | } | |
147 | ||
6522869c JF |
148 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
149 | { | |
150 | pteval_t v = native_pte_val(pte); | |
151 | ||
152 | return native_make_pte(v | set); | |
153 | } | |
154 | ||
155 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) | |
156 | { | |
157 | pteval_t v = native_pte_val(pte); | |
158 | ||
159 | return native_make_pte(v & ~clear); | |
160 | } | |
161 | ||
3cbaeafe JP |
162 | static inline pte_t pte_mkclean(pte_t pte) |
163 | { | |
6522869c | 164 | return pte_clear_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
165 | } |
166 | ||
167 | static inline pte_t pte_mkold(pte_t pte) | |
168 | { | |
6522869c | 169 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
170 | } |
171 | ||
172 | static inline pte_t pte_wrprotect(pte_t pte) | |
173 | { | |
6522869c | 174 | return pte_clear_flags(pte, _PAGE_RW); |
3cbaeafe JP |
175 | } |
176 | ||
177 | static inline pte_t pte_mkexec(pte_t pte) | |
178 | { | |
6522869c | 179 | return pte_clear_flags(pte, _PAGE_NX); |
3cbaeafe JP |
180 | } |
181 | ||
182 | static inline pte_t pte_mkdirty(pte_t pte) | |
183 | { | |
6522869c | 184 | return pte_set_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
185 | } |
186 | ||
187 | static inline pte_t pte_mkyoung(pte_t pte) | |
188 | { | |
6522869c | 189 | return pte_set_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
190 | } |
191 | ||
192 | static inline pte_t pte_mkwrite(pte_t pte) | |
193 | { | |
6522869c | 194 | return pte_set_flags(pte, _PAGE_RW); |
3cbaeafe JP |
195 | } |
196 | ||
197 | static inline pte_t pte_mkhuge(pte_t pte) | |
198 | { | |
6522869c | 199 | return pte_set_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
200 | } |
201 | ||
202 | static inline pte_t pte_clrhuge(pte_t pte) | |
203 | { | |
6522869c | 204 | return pte_clear_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
205 | } |
206 | ||
207 | static inline pte_t pte_mkglobal(pte_t pte) | |
208 | { | |
6522869c | 209 | return pte_set_flags(pte, _PAGE_GLOBAL); |
3cbaeafe JP |
210 | } |
211 | ||
212 | static inline pte_t pte_clrglobal(pte_t pte) | |
213 | { | |
6522869c | 214 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
3cbaeafe | 215 | } |
4614139c | 216 | |
7e675137 NP |
217 | static inline pte_t pte_mkspecial(pte_t pte) |
218 | { | |
6522869c | 219 | return pte_set_flags(pte, _PAGE_SPECIAL); |
7e675137 NP |
220 | } |
221 | ||
b534816b JF |
222 | /* |
223 | * Mask out unsupported bits in a present pgprot. Non-present pgprots | |
224 | * can use those bits for other purposes, so leave them be. | |
225 | */ | |
226 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) | |
227 | { | |
228 | pgprotval_t protval = pgprot_val(pgprot); | |
229 | ||
230 | if (protval & _PAGE_PRESENT) | |
231 | protval &= __supported_pte_mask; | |
232 | ||
233 | return protval; | |
234 | } | |
235 | ||
6fdc05d4 JF |
236 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
237 | { | |
b534816b JF |
238 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
239 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
240 | } |
241 | ||
242 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) | |
243 | { | |
b534816b JF |
244 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
245 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
246 | } |
247 | ||
38472311 IM |
248 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
249 | { | |
250 | pteval_t val = pte_val(pte); | |
251 | ||
252 | /* | |
253 | * Chop off the NX bit (if present), and add the NX portion of | |
254 | * the newprot (if present): | |
255 | */ | |
1c12c4cf | 256 | val &= _PAGE_CHG_MASK; |
b534816b | 257 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
38472311 IM |
258 | |
259 | return __pte(val); | |
260 | } | |
261 | ||
1c12c4cf VP |
262 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
263 | #define pgprot_modify pgprot_modify | |
264 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) | |
265 | { | |
266 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; | |
267 | pgprotval_t addbits = pgprot_val(newprot); | |
268 | return __pgprot(preservebits | addbits); | |
269 | } | |
270 | ||
77be1fab | 271 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
c6ca18eb | 272 | |
b534816b | 273 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
1e8e23bc | 274 | |
1adcaafe SS |
275 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
276 | unsigned long flags, | |
277 | unsigned long new_flags) | |
afc7d20c | 278 | { |
1adcaafe | 279 | /* |
55a6ca25 | 280 | * PAT type is always WB for untracked ranges, so no need to check. |
1adcaafe | 281 | */ |
8a271389 | 282 | if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
1adcaafe SS |
283 | return 1; |
284 | ||
afc7d20c | 285 | /* |
286 | * Certain new memtypes are not allowed with certain | |
287 | * requested memtype: | |
288 | * - request is uncached, return cannot be write-back | |
289 | * - request is write-combine, return cannot be write-back | |
290 | */ | |
291 | if ((flags == _PAGE_CACHE_UC_MINUS && | |
292 | new_flags == _PAGE_CACHE_WB) || | |
293 | (flags == _PAGE_CACHE_WC && | |
294 | new_flags == _PAGE_CACHE_WB)) { | |
295 | return 0; | |
296 | } | |
297 | ||
298 | return 1; | |
299 | } | |
300 | ||
458a3e64 TH |
301 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
302 | pte_t *populate_extra_pte(unsigned long vaddr); | |
4614139c JF |
303 | #endif /* __ASSEMBLY__ */ |
304 | ||
96a388de TG |
305 | #ifdef CONFIG_X86_32 |
306 | # include "pgtable_32.h" | |
307 | #else | |
308 | # include "pgtable_64.h" | |
309 | #endif | |
6c386655 | 310 | |
aca159db | 311 | #ifndef __ASSEMBLY__ |
f476961c | 312 | #include <linux/mm_types.h> |
aca159db | 313 | |
a034a010 JF |
314 | static inline int pte_none(pte_t pte) |
315 | { | |
316 | return !pte.pte; | |
317 | } | |
318 | ||
8de01da3 JF |
319 | #define __HAVE_ARCH_PTE_SAME |
320 | static inline int pte_same(pte_t a, pte_t b) | |
321 | { | |
322 | return a.pte == b.pte; | |
323 | } | |
324 | ||
7c683851 JF |
325 | static inline int pte_present(pte_t a) |
326 | { | |
327 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); | |
328 | } | |
329 | ||
eb63657e | 330 | static inline int pte_hidden(pte_t pte) |
dfec072e | 331 | { |
eb63657e | 332 | return pte_flags(pte) & _PAGE_HIDDEN; |
dfec072e VN |
333 | } |
334 | ||
649e8ef6 JF |
335 | static inline int pmd_present(pmd_t pmd) |
336 | { | |
18a7a199 | 337 | return pmd_flags(pmd) & _PAGE_PRESENT; |
649e8ef6 JF |
338 | } |
339 | ||
4fea801a JF |
340 | static inline int pmd_none(pmd_t pmd) |
341 | { | |
342 | /* Only check low word on 32-bit platforms, since it might be | |
343 | out of sync with upper half. */ | |
26c8e317 | 344 | return (unsigned long)native_pmd_val(pmd) == 0; |
4fea801a JF |
345 | } |
346 | ||
3ffb3564 JF |
347 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
348 | { | |
349 | return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK); | |
350 | } | |
351 | ||
e5f7f202 IM |
352 | /* |
353 | * Currently stuck as a macro due to indirect forward reference to | |
354 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
355 | */ | |
db3eb96f | 356 | #define pmd_page(pmd) pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT) |
20063ca4 | 357 | |
e24d7eee JF |
358 | /* |
359 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] | |
360 | * | |
361 | * this macro returns the index of the entry in the pmd page which would | |
362 | * control the given virtual address | |
363 | */ | |
ce0c0f9e | 364 | static inline unsigned long pmd_index(unsigned long address) |
e24d7eee JF |
365 | { |
366 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); | |
367 | } | |
368 | ||
97e2817d JF |
369 | /* |
370 | * Conversion functions: convert a page and protection to a page entry, | |
371 | * and a page entry and page directory to the page they refer to. | |
372 | * | |
373 | * (Currently stuck as a macro because of indirect forward reference | |
374 | * to linux/mm.h:page_to_nid()) | |
375 | */ | |
376 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
377 | ||
346309cf JF |
378 | /* |
379 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] | |
380 | * | |
381 | * this function returns the index of the entry in the pte page which would | |
382 | * control the given virtual address | |
383 | */ | |
ce0c0f9e | 384 | static inline unsigned long pte_index(unsigned long address) |
346309cf JF |
385 | { |
386 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); | |
387 | } | |
388 | ||
3fbc2444 JF |
389 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
390 | { | |
391 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); | |
392 | } | |
393 | ||
99510238 JF |
394 | static inline int pmd_bad(pmd_t pmd) |
395 | { | |
18a7a199 | 396 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
99510238 JF |
397 | } |
398 | ||
cc290ca3 JF |
399 | static inline unsigned long pages_to_mb(unsigned long npg) |
400 | { | |
401 | return npg >> (20 - PAGE_SHIFT); | |
402 | } | |
403 | ||
6cf71500 JF |
404 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
405 | remap_pfn_range(vma, vaddr, pfn, size, prot) | |
406 | ||
5ba7c913 | 407 | #if PAGETABLE_LEVELS > 2 |
deb79cfb JF |
408 | static inline int pud_none(pud_t pud) |
409 | { | |
26c8e317 | 410 | return native_pud_val(pud) == 0; |
deb79cfb JF |
411 | } |
412 | ||
5ba7c913 JF |
413 | static inline int pud_present(pud_t pud) |
414 | { | |
18a7a199 | 415 | return pud_flags(pud) & _PAGE_PRESENT; |
5ba7c913 | 416 | } |
6fff47e3 JF |
417 | |
418 | static inline unsigned long pud_page_vaddr(pud_t pud) | |
419 | { | |
420 | return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK); | |
421 | } | |
f476961c | 422 | |
e5f7f202 IM |
423 | /* |
424 | * Currently stuck as a macro due to indirect forward reference to | |
425 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
426 | */ | |
427 | #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT) | |
01ade20d JF |
428 | |
429 | /* Find an entry in the second-level page table.. */ | |
430 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) | |
431 | { | |
432 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); | |
433 | } | |
3180fba0 | 434 | |
3f6cbef1 JF |
435 | static inline int pud_large(pud_t pud) |
436 | { | |
e2f5bda9 | 437 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3f6cbef1 JF |
438 | (_PAGE_PSE | _PAGE_PRESENT); |
439 | } | |
a61bb29a JF |
440 | |
441 | static inline int pud_bad(pud_t pud) | |
442 | { | |
18a7a199 | 443 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
a61bb29a | 444 | } |
e2f5bda9 JF |
445 | #else |
446 | static inline int pud_large(pud_t pud) | |
447 | { | |
448 | return 0; | |
449 | } | |
5ba7c913 JF |
450 | #endif /* PAGETABLE_LEVELS > 2 */ |
451 | ||
9f38d7e8 JF |
452 | #if PAGETABLE_LEVELS > 3 |
453 | static inline int pgd_present(pgd_t pgd) | |
454 | { | |
18a7a199 | 455 | return pgd_flags(pgd) & _PAGE_PRESENT; |
9f38d7e8 | 456 | } |
c5f040b1 JF |
457 | |
458 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) | |
459 | { | |
460 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); | |
461 | } | |
777cba16 | 462 | |
e5f7f202 IM |
463 | /* |
464 | * Currently stuck as a macro due to indirect forward reference to | |
465 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
466 | */ | |
467 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) | |
7cfb8102 JF |
468 | |
469 | /* to find an entry in a page-table-directory. */ | |
ce0c0f9e | 470 | static inline unsigned long pud_index(unsigned long address) |
7cfb8102 JF |
471 | { |
472 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); | |
473 | } | |
3d081b18 JF |
474 | |
475 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) | |
476 | { | |
477 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); | |
478 | } | |
30f10316 JF |
479 | |
480 | static inline int pgd_bad(pgd_t pgd) | |
481 | { | |
18a7a199 | 482 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
30f10316 | 483 | } |
7325cc2e JF |
484 | |
485 | static inline int pgd_none(pgd_t pgd) | |
486 | { | |
26c8e317 | 487 | return !native_pgd_val(pgd); |
7325cc2e | 488 | } |
9f38d7e8 JF |
489 | #endif /* PAGETABLE_LEVELS > 3 */ |
490 | ||
4614139c JF |
491 | #endif /* __ASSEMBLY__ */ |
492 | ||
fb15a9b3 JF |
493 | /* |
494 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] | |
495 | * | |
496 | * this macro returns the index of the entry in the pgd page which would | |
497 | * control the given virtual address | |
498 | */ | |
499 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
500 | ||
501 | /* | |
502 | * pgd_offset() returns a (pgd_t *) | |
503 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; | |
504 | */ | |
505 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) | |
506 | /* | |
507 | * a shortcut which implies the use of the kernel's pgd, instead | |
508 | * of a process's | |
509 | */ | |
510 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) | |
511 | ||
512 | ||
68db065c JF |
513 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
514 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) | |
515 | ||
195466dc JF |
516 | #ifndef __ASSEMBLY__ |
517 | ||
2c1b284e JSR |
518 | extern int direct_gbpages; |
519 | ||
4891645e JF |
520 | /* local pte updates need not use xchg for locking */ |
521 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) | |
522 | { | |
523 | pte_t res = *ptep; | |
524 | ||
525 | /* Pure native function needs no input for mm, addr */ | |
526 | native_pte_clear(NULL, 0, ptep); | |
527 | return res; | |
528 | } | |
529 | ||
530 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, | |
531 | pte_t *ptep , pte_t pte) | |
532 | { | |
533 | native_set_pte(ptep, pte); | |
534 | } | |
535 | ||
0a47de52 AA |
536 | static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr, |
537 | pmd_t *pmdp , pmd_t pmd) | |
538 | { | |
539 | native_set_pmd(pmdp, pmd); | |
540 | } | |
541 | ||
195466dc JF |
542 | #ifndef CONFIG_PARAVIRT |
543 | /* | |
544 | * Rules for using pte_update - it must be called after any PTE update which | |
545 | * has not been done using the set_pte / clear_pte interfaces. It is used by | |
546 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE | |
547 | * updates should either be sets, clears, or set_pte_atomic for P->P | |
548 | * transitions, which means this hook should only be called for user PTEs. | |
549 | * This hook implies a P->P protection or access change has taken place, which | |
550 | * requires a subsequent TLB flush. The notification can optionally be delayed | |
551 | * until the TLB flush event by using the pte_update_defer form of the | |
552 | * interface, but care must be taken to assure that the flush happens while | |
553 | * still holding the same page table lock so that the shadow and primary pages | |
554 | * do not become out of sync on SMP. | |
555 | */ | |
556 | #define pte_update(mm, addr, ptep) do { } while (0) | |
557 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
558 | #endif | |
559 | ||
195466dc JF |
560 | /* |
561 | * We only update the dirty/accessed state if we set | |
562 | * the dirty bit by hand in the kernel, since the hardware | |
563 | * will do the accessed bit for us, and we don't want to | |
564 | * race with other CPU's that might be updating the dirty | |
565 | * bit at the same time. | |
566 | */ | |
bea41808 JF |
567 | struct vm_area_struct; |
568 | ||
195466dc | 569 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
ee5aa8d3 JF |
570 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
571 | unsigned long address, pte_t *ptep, | |
572 | pte_t entry, int dirty); | |
195466dc JF |
573 | |
574 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
f9fbf1a3 JF |
575 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
576 | unsigned long addr, pte_t *ptep); | |
195466dc JF |
577 | |
578 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH | |
c20311e1 JF |
579 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
580 | unsigned long address, pte_t *ptep); | |
195466dc JF |
581 | |
582 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
3cbaeafe JP |
583 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
584 | pte_t *ptep) | |
195466dc JF |
585 | { |
586 | pte_t pte = native_ptep_get_and_clear(ptep); | |
587 | pte_update(mm, addr, ptep); | |
588 | return pte; | |
589 | } | |
590 | ||
591 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL | |
3cbaeafe JP |
592 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
593 | unsigned long addr, pte_t *ptep, | |
594 | int full) | |
195466dc JF |
595 | { |
596 | pte_t pte; | |
597 | if (full) { | |
598 | /* | |
599 | * Full address destruction in progress; paravirt does not | |
600 | * care about updates and native needs no locking | |
601 | */ | |
602 | pte = native_local_ptep_get_and_clear(ptep); | |
603 | } else { | |
604 | pte = ptep_get_and_clear(mm, addr, ptep); | |
605 | } | |
606 | return pte; | |
607 | } | |
608 | ||
609 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT | |
3cbaeafe JP |
610 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
611 | unsigned long addr, pte_t *ptep) | |
195466dc | 612 | { |
d8d89827 | 613 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
195466dc JF |
614 | pte_update(mm, addr, ptep); |
615 | } | |
616 | ||
61c77326 SL |
617 | #define flush_tlb_fix_spurious_fault(vma, address) |
618 | ||
85958b46 JF |
619 | /* |
620 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); | |
621 | * | |
622 | * dst - pointer to pgd range anwhere on a pgd page | |
623 | * src - "" | |
624 | * count - the number of pgds to copy. | |
625 | * | |
626 | * dst and src can be on the same page, but the range must not overlap, | |
627 | * and must not cross a page boundary. | |
628 | */ | |
629 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) | |
630 | { | |
631 | memcpy(dst, src, count * sizeof(pgd_t)); | |
632 | } | |
633 | ||
634 | ||
195466dc JF |
635 | #include <asm-generic/pgtable.h> |
636 | #endif /* __ASSEMBLY__ */ | |
637 | ||
1965aae3 | 638 | #endif /* _ASM_X86_PGTABLE_H */ |